Land-roller.



R. A. PITMAN.

LAND ROLLER.

APPLICATION FILED FEB.12, 19!].

1,269,573; 1 LPatente Mar. I

BY Hi8 ATTOFPNE;/5,-

W w ubi.

Fe -Tia manner a, rarit es, er rnrtansnrnm, rnnnsirnvmvm, assrenon TO THE DUNHAM answerer, BEIREA, 01x10, A conroan'rreu or OHIO.

LAND-EGLLER. 3'

specification of Letters Patent. 'Pad entefl Mal. 1918 Application filed February 12, 1917. SrialNo. 148,142.

To all whom it may concern;

.Be it known that}, itonrm'r A. PrTMAN, a

v citizen of the United-States, and a resident of Philadelphia, Pennsylvania, have invented new and useful Improvements in Land-Rollers, of 'which the following is a specification.

' signed to crush clods and substantially pul- VGI'IZG the surface of a plowed field, road or My invention relates to land rollers dethe like, and one object of my invention 1s to provide an annular unit section whereby a roller structure of this character may be made in any length desired, from a plurality of said annular unit j'sections duplicated throughout the length of the roller; said unit sections being designed to mate with and supplement adjacent sections of thesamesize. and'shape, and when assembled providing thedesired roller structure with a corrugated-f surface constituting the other obj ect1 ofni" invention.

' ,features of my invention cribs-d hereinafter, referhe accompanying drawing in Whlth e shown a view partly in elevation and partly in section of a land roller orpu'iverizer made up of the special unit sections naccordancewith my invention. 1 My improved. roller is of the type presenting an external corrugated contour having a plurality'fof annular ribs or projections substantially .jV-shape in cross-section In rollers of this type made-0t separable sections, more or less difiiculty'h'as been experienced heretofore in constructing the same,

especially where it may be desired to provide an integral or substantially integral unit. With a view, of overcoming or obviating former} difficulties of this character, have devised a special form of annular mem- 'berreprese ted in the accompanying drawthe rim flange omits the tapered portionexternally are connected, which rim flange is concave on its outer or ground-engaging surface The concavity of the rim flange is relative} deep," and it may be of any desired contmr.

The rim flange 3 is wideron one side than the other with respect to a plane :1? a; passing throughthe middleof the hub 2; thewide!" side, indicated at3, having the greatest diameter of the annular member and including the apex at of the tapered annular rib or projection provided by the respective unit sections. Additionally this side .of-the rim flange provides an annular shoulder 5, inwardly disposed with respectto the tapered portion 4, The opposite side 3*,"01?

and

is squared at 6 to lie adjacent and substantially in contact with the shoulder .5 of an adjoining member. a s f Toconstruct a roller from these unit sections, it is only necessary to assemble the desired number upon a suitable shaft as 7 and connect said shaft-to a suitable frame,

of which side members}? are indicated in.

the drawing The fastening means securlng shaft and frame together serve to maintam said annular unit sections substantially in contact with each other while-permitting them to rotate independentlyyof each other for the desired purpose. 1

My improved annular unit structure is an integral casting ready for assembly with others to form a roller or pulverizer as soon as removed from the mold and cooled. Such unit member maybe of any desired size and proportions following the contour indicated', and may be castin a permanent mold,

or in any other suitable or convenient manner.

1. As anew article of manufacture, a wheel-like unit section having a rim flange externally concaved, one side of said rim flange being wider than the other with respect to the wider side having an inwardly disposed shoulder for engagement with the flange of an adjoining section; A

2. Asa newarticle of manufacture, a wheel-l ke unit sectlon havlng a run flange tapered rip, one side of said rim flange being wider than the other with respect to the median plane of the hub. said wider side median plane of the hub, said concaved and formed with a' having an inwardly disposed shoulder for engagement with the flange of an adjoining section.

3. As a newarticle of manufacture, a wheel-like unit section having a rim flange externally ,concaved, one side of said rim flange being wider than the other with respect to the median plane ofthe hub, said wider side having an outwardly tapered marginal portion forming an annular rib and an inwardly disposed shoulder directly adjacent said margin for engagement with the flange of an adjoinin section.

4. As anew article or manufacture, an integral wheel-like unit section having an annular concaved flange and adapted, when assembled with other similarly shaped sections, to form a roller structure with an-' nular ribs orprojections, said ribs or projections being formed at one side of said concaved flange, the .latter being inwgrdly shouldered for engagement by the flange of an adjacent section.

5. As a new article of manufacture, an integral unit section comprising a. hub, an externally concaved flange, and spokes connecting said hub and flange; one side of'said flange being wider-than the other and having an inwardly disposed shouldered wall, the opposite side ofthe flange being shaped to abut'a similar shoulder carried by an adjoining unit section.

6. As a new article of manufacture, an integral unit section comprising a hub, an

momma externally concaved flange, and spokes connecting said hub and flange; one side of said flange being wider thanthe other and extending outwardly in a tapered portion forming an annular rib and having an inwardly disposed shouldered wall, the opposite side of the flange being reduced in diameter and squared to abut a similar shoulder carried by an adjoining unit section. I

7. As a new article of manufacture, a wheel-like unit section having an annular rim flange; one side of the latter being wider than the other withrespect to the median plane of the hubs, that side of such greater width being adapted to form in conjunction with the side of smaller width oiian adjacent section, an outwardly projecting V.- shaped rib.

8. A corrugated land-roller made up of a plurality of wheel-like 'unit sections rotatable independently of each other and forming a plurality of outwardly extending V- shaped ribs; every rib of the roller being formed by two adjacent and independently rotatable units. i

9. A corrugated land roller made up of a plurality of wheel-like unit sections each having an externally concaved flange provided at one side-with an annular rib or pro jection, said rib having an inwardly disposed shoulder in engagement with the opposite flange of an ad oining section.

ROBERT A'. PITMAN. 

